China's wetland soil organic carbon pool: New estimation on pool size, change, and trajectory

Global Change Biology, Год журнала: 2023, Номер 29(21), С. 6139 - 6156

Опубликована: Авг. 28, 2023

Abstract Robust estimates of wetland soil organic carbon (SOC) pools are critical to understanding dynamics in the global cycle. However, previous were highly variable and uncertain, due likely data sources method used. Here we used machine learning estimate SOC storage their changes over time China's wetlands based on density database, associated geospatial environmental data, recently published maps. We built a database China that contains 809 samples from 181 studies collected last 20 years as presented literature. All extended standardized 1‐m depth, basis relationship between profiles different depths. three methods evaluate robustness estimating China. The results indicated random forest model achieved accurate estimation with R 2 being .65. showed average top 1 m was 25.03 ± 3.11 kg C −2 2000 26.57 3.73 2020, an increase 6.15%. change 4.73 0.58 Pg 4.35 0.61 decrease 8.03%, 13.6% decreased area 189.12 × 10 3 162.8 km despite during same period. accumulation rate 107.5 12.4 g year −1 since no changes. Climate caused variations density, future warming drying climate would lead decreases storage. Estimates under Shared Socioeconomic Pathway 1‐2.6 (low‐carbon emissions) suggested not significantly by 2100, but 5‐8.5 (high‐carbon emissions), it approximately 5.77%. In this study, optimized aspects, including sample extent, method. Our study indicates importance using consistent extent projecting

Язык: Английский

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Effects of Erosion Gully Drainage on Soil Organic Carbon Spatial Differentiation Pattern in Alpine Peatlands

Wetlands, Год журнала: 2025, Номер 45(2)

Опубликована: Фев. 1, 2025

Язык: Английский

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Restoration recovers plant diversity but changes species composition and biomass allocation in an alpine peatland

Ecological Processes, Год журнала: 2025, Номер 14(1)

Опубликована: Март 3, 2025

Abstract Background The Zoige Plateau hosts the largest alpine peatland in world, playing a crucial role carbon sequestration and biodiversity conservation. However, this valuable ecosystem has been significantly impacted by anthropogenic drainage for various purposes, prompting increased interests ecological restoration efforts. This study evaluates changes plant diversity, community composition, biomass allocation across natural, drained, rewetted peatlands, with particular focus on variations microtopography, including hollows hummocks. Results Restoration showed higher soil water content, which was 11.6% (to 88.5 ± 0.09%) 14.4% hummocks 81.1 1.6%) of peatlands compared to natural ( p < 0.001). table depth did not differ from that = 0.61). While management affect microtopography had considerable impact species richness, dominance, Shannon–Wiener index, evenness. Conversely, composition exhibited significant differences among at both hollow hummock microsites. Aboveground drained microsites, whereas belowground lower particularly Conclusions Rewetting raises but does fully restore original or biomass. Microtopography plays vital influencing diversity showing greater resilience impacts. Our findings emphasize consequences practices highlight need targeted strategies strengthen these ecosystems.

Язык: Английский

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Tracing the roots of wetland degradation in India: a systematic review of anthropogenic drivers, ecological consequences and conservation strategies

GeoJournal, Год журнала: 2024, Номер 89(1)

Опубликована: Янв. 26, 2024

Язык: Английский

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Linking carbon storage with land use dynamics in a coastal Ramsar wetland

The Science of The Total Environment, Год журнала: 2024, Номер 932, С. 173078 - 173078

Опубликована: Май 8, 2024

Язык: Английский

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Analysis of long-term spatio-temporal changes of plateau urban wetland reveals the response mechanisms of climate and human activities: A case study from Dianchi Lake Basin 1993–2020

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169447 - 169447

Опубликована: Дек. 22, 2023

Язык: Английский

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CO2 fluxes contrast between aquaculture ponds and mangrove forests and its implications for coastal wetland rehabilitation in Leizhou Peninsula, China

Agriculture Ecosystems & Environment, Год журнала: 2024, Номер 367, С. 108968 - 108968

Опубликована: Март 9, 2024

Язык: Английский

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A Systematic Review and Global Trends on Blue Carbon and Sustainable Development: A Bibliometric Study from 2012 to 2023

Sustainability, Год журнала: 2024, Номер 16(6), С. 2473 - 2473

Опубликована: Март 16, 2024

Halfway through Transforming Our World: The 2030 Agenda for Sustainable Development, only 15 percent of the goals have been reached. As a carbon storage and climate change mitigation mechanism, blue is closely related to sustainable development plays an important role in global cycle. In spite its great potential, still faces several challenges terms achieving Development Goals. Herein, this review aims retrieve all known impacts on research published Web Science from 2012 2023 using sequence bibliometric analyses. Keywords such as “blue carbon” “sustain*” (including “sustainability”, “sustainable”, etc.) were used article extraction. CiteSpace, science mapping tool, was capture visually present information about development. Upon reviewing existing literature, no study has concentrated bibliometrically analyzing visualizing studies This sets out fill gap by examining key areas concentration works date. Moreover, integration may help develop supportive policies marine sinks. Despite valuable contribution body knowledge, generalizations results must be made cautiously due use single database, which case Science.

Язык: Английский

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Three Gorges Dam Operations Affect the Carbon Dioxide Budget of a Large Downstream Connected Lake

Geophysical Research Letters, Год журнала: 2023, Номер 50(12)

Опубликована: Июнь 12, 2023

Abstract The effects of dams on carbon dioxide (CO 2 ) fluxes in downstream lakes remain elusive. Here we combined eddy covariance observations and random forest models to examine multi‐decadal variations CO the Poyang Lake, largest freshwater lake China, quantified contribution Three Gorges Dam (TGD), world's hydraulic project. We found fluctuated between source sink 1961–2016, tended be post‐TGD period (2003–2016) when vegetation expanded early spatially due declining water level. TGD can explain approximately 6% total differences annual fluxes, with major contributions impoundment (up 22% middle September October). results show a positive side operational projects sink, probably caution negative release after dam removal.

Язык: Английский

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Radiative forcing of methane emission completely offsets net carbon dioxide uptake in a temperate freshwater marsh from the present to future

Agricultural and Forest Meteorology, Год журнала: 2024, Номер 346, С. 109889 - 109889

Опубликована: Янв. 10, 2024

Язык: Английский

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